ipv6向后兼容ipv4吗? [英] is ipv6 backward compatible with ipv4?

问题描述

我有一个使用ipv4编写的udp示例程序.如果我将代码更改为ipv6，我是否仍可以使用具有ipv4地址的侦听器与任何人进行通信?我在

I've got a little udp example program written using ipv4. If I alter the code to ipv6 would I still be able to communicate with anyone using the listener with an ipv4 address? I was looking at porting examples at

http://ou800doc.caldera.com/en/SDK_netapi/sockC .PortIPv4appIPv6.html

我不确定是否只是更改代码就能确保它能正常工作，还是我必须以对决堆栈模式编写它.

I'm not sure if simply altering the code would ensure that it worked or if I'd have to write it in duel-stack mode.

推荐答案

是，不是.IPv6确实包含完全不同的寻址，因此，您必须重新编码应用程序以使用备用标头和结构大小.

Yes and no... IPv6 does contain completely different addressing, so you'll have to recode your app to use the alternative headers and structure sizes.

但是，IPv4地址范围在IPv6中可用，其语法是在标准地址(例如:: 10.11.12.13)之前添加两个冒号.您还可以在IPv6数据包中嵌入IPv4地址.

However, the IPv4 address range is available within IPv6, the syntax is to add two colons before the standard address (eg ::10.11.12.13). You can also embed IPv4 addresses within IPv6 packets.

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